Splitting nitrogen (N) fertilizer application is key to increasing potato tuber yield and uptake efficiency (NUpE), particularly in coarse-textured soils. The study objective was determine optimum N rates timing maximize plant growth under four irrigation methods: seepage, subirrigation with drain tile, subsurface drip (SDI) for water table level management, sprinkler. A factorial design of three applied at planting (Npl) (0, 56, 112 kg ha−1), followed by two (56 ha−1) emergence (Neme),...

Optimizing irrigation and nitrogen (N) fertilizer management in irrigated potato crops grown on sandy soils subtropical regions such as northeastern Florida, USA is essential to sustain a high yield minimize leaching. N applications this region typically occur at approximately 25–30 days prior planting (Npre), emergence (Neme), tuber initiation (Nti). However, recent studies suggest that applying near (Npl) enhances use efficiency (FNUE). We combined experimentation with modeling assess...

Methods of multivariate analysis is a powerful approach to assist the initial stages crops genetic improvement, particularly, because it allows many traits be evaluated simultaneously. In this study, heat-tolerant genotypes have been selected by analyzing phenotypic diversity, direct and indirect relationships among were identified, four selection indices compared. Diversity was estimated using K-means clustering with number clusters determined Elbow method, relationship quantified path...

Terpenes play a vital role in plant defense; tomato plants produce diverse range of terpenes within specialized glandular trichomes, influencing interactions with herbivores, predators, and pollinators. This study employed two distinct methods, namely leaf dip maceration, to extract trichomes from leaves. Terpene quantification was carried out using Gas Chromatography-Mass Spectrometry (GC-MS). The method proved effective selectively targeting trichome content, revealing unique extraction...

Organic vegetable producers in Georgia, USA, utilize a range of amendments to supply nitrogen (N) for crop production. However, differences soil type, fertilizers and environmental conditions can result variability N mineralization rates among commonly utilized organic the region. In this study, effects temperature on from three commercial [feather meal (FM), pelleted poultry litter (PPL) mixed fertilizer (MIX)] two types USA (Cecil sandy clay loam Tifton loamy sand) were evaluated 120 d....

Abstract Phosphorus (P) and sulfur (S) interaction has been unexplored in the potato ( Solanum tuberosum L.) cultivation of Florida sandy soils. This study investigated response to P S applications regarding yield, quality, fertilizer use efficiency. The three (0, 56, 112 kg ha −1 ) rates were applied along with five 45, 90, 135, 180 at two sites split‐plot randomized complete block designs 2021 2022. found that application did not affect soil availability P. effects observed, where addition...

Surface water poses a great risk to fruit and vegetable crops when contaminated by foodborne pathogens. Several factors impact the microbial quality of surface waters increase produce contamination. Therefore, evaluating associated with prevalence pathogenic microorganisms in agricultural sources is critical determine establish preventive actions that may minimize incidence outbreaks production water. In Southeastern U.S. environmental such as rainfall, temperature, seasonal variations have...

This review was conducted to synthesize current knowledge, learn producer and Extension specialist perspectives, identify gaps in understanding of the role soil health sustaining production high tunnel (HT) systems. synthesis includes findings from scholarly resources related HTs, including research Extension-based literature, perspectives experienced HT producers technical assistance providers, direct observations a broad network university personnel working with HTs. Findings are intended...

Sweet corn (Zea mays convar. saccharata var. rugosa) is an important crop in the United States (US), particularly southeastern region. While effective nitrogen (N) management essential for optimizing yields, sandy soils and variable precipitation this region impact N uptake. This study evaluates effects of several rates (ranging from 224 to 336 kg ha−1) fertilizer application timing (N applied at emergence side-dress stages) on sweet growth yield under subtropical environmental conditions...

The use of plastic mulching for vegetable production systems is a common practice in the southeastern United States. Plastic known to benefit crop growth and yield. However, mulch application removal from fields time-consuming expensive. To reduce time expense removal, growers have double-, triple-, or even quadruple-cropped on single mulch, where second, third, fourth grown after preceding harvested. evaluate potential detrimental effects multicropping systems, an on-farm experiment was...

In the United States, pumpkins are culturally significant during fall, contributing to increased sales and revenue for growers. However, pumpkin production in Southeastern States may be challenging due specific weather conditions prevalence of disease pests. This study evaluated performance 12 commercially available cultivars through field experiments conducted Georgia, USA 2021 2022 Alabama, 2022. The results indicate that was a critical factor influencing key fruit parameters, including...

The sweetpotato whitefly, Bemisia tabaci MEAM1 Gennadius (Hemiptera: Aleyrodidae), and the complex of viruses it transmits are major limiting factors to squash production in southeastern United States. At this time, insecticides extensively relied upon for management whiteflies and, indirectly, whitefly-transmitted viruses. development a multi-faceted, integrated pest (IPM) program is needed increase sustainability profitability production. Experiments 2018 2019 evaluated effects insect...

Essential oils (EOs) have strong antibacterial properties and can be potential sanitizers to reduce pathogen load prevent cross-contamination during postharvest washing. The objective of this study was investigate the efficacy emulsions containing oregano (OR; Origanum vulgare) winter savory (WS; Satureja montana) EOs at different concentrations (0.94 1.88 µL/mL) storage times (0 h, 24 7 days), in reducing Escherichia coli O157:H7 on surface three types lettuce (romaine, crisphead,...

Recent cyclosporiasis outbreaks associated with fresh produce grown in the United States highlight need to better understand Cyclospora cayetanensis prevalence U.S. agricultural environments. In this study, C. occurrence was assessed municipal wastewater sludge, on-farm portable toilets, irrigation pond water, and spent packing house dump tank water a Southeastern Georgia growing region over two years. Detection of 18S rRNA qPCR gene target samples 0%, 28%, 42% (N = 217) depending on...

Irrigating fresh produce with contaminated water contributes to the burden of foodborne illness. Identifying fecal contamination irrigation waters and characterizing sources associated environmental factors can help inform safety health hazard management. Using two previously collected data sets, we developed evaluated performance logistic regression conditional random forest models for predicting general human-specific ponds in southwest Georgia used irrigation. Generic

Summer squash ( Cucurbita pepo L.) is a major vegetable crop produced in Georgia and Florida during the fall season. This production vulnerable to whitefly Bemisisia tabaci Genn.)-transmitted viruses that lead severe yield losses. Over past several years, populations have increased fall, thus leading an increase whitefly-transmitted such as Cucurbit leaf crumple virus (CuLCrV) yellow stunting disorder (CYSDV). Whitefly management for summer relies on use of insecticides can be costly without...

Core Ideas Estimation of water table level supplies upward flux for daily ETc needs. Episodic master recession method informs control during rain events. Water varies by soil and irrigation, with fastest rates under subirrigation. Irrigation depth may be reduced in sprinkler areas management. Agricultural shallow tables usually rely on to supply crop evapotranspiration (ETc). The study objective was determine optimum levels coarse‐textured soils cultivated potato ( Solanum tuberosum L.)...

Large populations of sweetpotato whiteflies ( Bemisia tabaci ) have become more regular occurrences during the fall months in parts southeastern United States. resulted a significant increase incidence whitefly-transmitted viruses, particularly cucurbit leaf crumple virus (CuLCrV), which has potential to cause complete yield loss fall-planted yellow squash and zucchini Cucurbita pepo ). This study evaluated commercial cultivars for resistance against CuLCrV estimated fruit quality under...

A novel produce wash consisting of pelargonic acid (PEL) emulsions was tested on tomatoes contaminated with a five-serovar Salmonella enterica cocktail. Ability to reduce contamination the inoculated tomato surface, as well mitigation subsequent cross-contamination uninoculated washed in re-used/spent water were examined. Sanitizer efficacy also examined over 1 and 7 d storage time (8 °C, recommended for red ripe tomatoes) presence 0.5% (w/v) organic load. PEL performed statistically same (p...

Georgia is a leading fresh market cabbage ( Brassica oleracea var. capitata ) producer. Current recommendations for bare-ground grown in the Coastal Plain of indicate 175 to 225 lb/acre nitrogen (N). Approximately one-third N fertilizer recommended at planting, with two or three additional side-dress applications during season. Growers have begun banding liquid between four and six times season reduce leaching enhance productivity. To determine validity current as well efficacy applying...

Efficient nitrogen (N) fertilizer applications in onion (Allium cepa L.) can reduce input costs and improve fertilizer-use efficiency, while maintaining high yields quality. Understanding the N requirements of at different growth stages is necessary to enhance N-use efficiency (FNUE). In a two-year study (2021 2022), FNUE onions was determined five development (at transplant, vegetative growth, bulb initiation, swelling maturation). The estimated by substituting conventional (ammonium...

Fresh produce can be contaminated by enteric pathogens throughout crop production, including through contact with agricultural water. The most common outbreaks and recalls in fresh are due to contamination Salmonella enterica Shiga toxin-producing E. coli (STEC). Thus, the objectives of this study were investigate prevalence markers for STEC ( wzy, hly , fliC eaeA rfbE stx -I, -II) invA ) surface water sources n = 8) from farms Southwest Georgia determine correlations among virulence STEC,...

The objective of this study was to evaluate the genetic effects involved in post-harvest water loss C. baccatum fruits and correlate fruit morphological characteristics. Fruits eight landraces their twenty-eight hybrids were evaluated a randomized, complete block design. Analysis variance, diallel analysis, phenotypic genotypic correlation, path analysis for traits performed. Fruit width, length, dry matter content, wall thickness determined by additive gene effects. On other hand,...